EP 0737167 B1 19990506 - PROCESS FOR THE PREPARATION OF A SULFATE- AND HYDROXIDE-BASED FERRIC COMPOUND
Title (en)
PROCESS FOR THE PREPARATION OF A SULFATE- AND HYDROXIDE-BASED FERRIC COMPOUND
Title (de)
VERFAHREN ZUR HERSTELLUNG VON VERBINDUNGEN AUF DER BASIS VON EISEN(III)SULFAT UND HYDROXID
Title (fr)
PROCEDE DE PREPARATION D'UN COMPOSE FERRIQUE A BASE DE SULFATE ET D'HYDROXYDE
Publication
Application
Priority
- FI 9400588 W 19941229
- FI 935946 A 19931230
Abstract (en)
[origin: WO9518069A1] The invention relates to a process for the preparation of a pure and solid, sulfate- and hydroxide-based ferric compound such as ferric hydroxysulfate or sodium jarosite, the process comprising the following procedures: a) a sulfate- and/or chloride-based ferric salt is prepared, b) an acidic aqueous solution is prepared which comprises either sulfate ions and ferric ions or sulfate, chloride and ferric ions, c) the acidic aqueous solution is maintained for 2-12 h at a temperature of 60-220 DEG C for the production of a solid, sulfate- and hydroxide-based ferric compound, such as ferric hydroxysulfate or sodium jarosite, by hydrolysis, and d) the pure and solid sulfate- and hydroxide-based ferric compound, such as ferric hydroxysulfate or sodium jarosite, is separated from the acidic aqueous solution. The processes for the preparation of ferric hydroxysulfate and sodium jarosite differ substantially only in that in the preparation of sodium jarosite an acid aqueous solution is prepared which, in addition to the either sulfate and ferric ions or sulfate, chloride and ferric ions, also contains a water-soluble sodium compound, in which case sodium jarosite is formed instead of ferric hydroxysulfate in the hydrolysis of point c) of the process.
IPC 1-7
IPC 8 full level
C01G 49/00 (2006.01); C01G 49/10 (2006.01); C01G 49/14 (2006.01)
CPC (source: EP)
C01G 49/009 (2013.01); C01G 49/10 (2013.01); C01G 49/14 (2013.01); C01P 2006/80 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IE IT LI NL PT SE
DOCDB simple family (publication)
WO 9518069 A1 19950706; AT E179681 T1 19990515; AU 1318995 A 19950717; CA 2180161 A1 19950706; CA 2180161 C 20070327; CZ 185696 A3 19961016; CZ 292901 B6 20040114; DE 69418346 D1 19990610; DE 69418346 T2 19990909; DK 0737167 T3 19991108; EP 0737167 A1 19961016; EP 0737167 B1 19990506; ES 2132612 T3 19990816; FI 935946 A0 19931230; FI 935946 A 19950701; FI 96841 B 19960531; FI 96841 C 19960910; GR 3030238 T3 19990831; KR 100275347 B1 20001215; NO 318550 B1 20050411; NO 962755 D0 19960628; NO 962755 L 19960829; PL 315194 A1 19961014
DOCDB simple family (application)
FI 9400588 W 19941229; AT 95904555 T 19941229; AU 1318995 A 19941229; CA 2180161 A 19941229; CZ 185696 A 19941229; DE 69418346 T 19941229; DK 95904555 T 19941229; EP 95904555 A 19941229; ES 95904555 T 19941229; FI 935946 A 19931230; GR 990401327 T 19990514; KR 19960703468 A 19960627; NO 962755 A 19960628; PL 31519494 A 19941229